Windmill



UNITED STATES PATENT OFFICE.

LEVI M. DEVORE, OF FREEPORT, ILLINOIS.

WINDMILL.

SPECIFICATION forming art of Letters Patent No. 227,418, dated May 11,1880.

- Application filed February 6, 1880.

To all whom it may concern:

Be it known that I, LEVI M. DEVORE, residing at Freeport, in the countyof Stephenson and State of Illinois, and a citizen of the United-States, have invented a new and useful Im provement in Windmills, ofwhich the following is a full description, reference being had to theaccompanyingdrawin gs, in which-- Figure 1 is a top view; Fig. 2, a sideelevation Fig. 3, a similar view, showing the parts in the positionwhich they occupy when the wind-wheel is turned out of the wind,

rotating in the bearing a, as usual. This part a and the parts directlyconnected therewith are constructed in the usual manner, and are somounted that they rotate together upon a suitable support, as is common.

B is the vane, which is secured to a casting, 1), and this casting b issecured to a strong rod, 0, which is mounted and supported in suitablebearings 70 l in such a manner that it can move vertically in itsbearings. These bearings are in arms or projections, which may be castwith the rotating head.

61 is an arm or bar, located as shown, being at a considerable distanceabove and in a plane at one side of the center bar, 6, of the vane.

f is a chain, one end of which is connected to the center bar, 0, of thevane, and the other end is connected to the bar d.

g and h are stops. The stop 9 is so located that it will come in contactwith the casting b on the vane when the wheel has been thrown out of thewind as far as itought to be, and the stop It is so located that aprojection, t, on the lower end of the casting b will come in contactwith such stop when the windwheel and vane are in the position shown inFig. 3.

The operation is as follows When the wind is light the wheel and vanewill remain in about the position shown in Fig. 2, there being no slackin the chain. When the force of the wind is sufficient to throw thewind-wheel out of the wind, overcoming the gravity of the vane, the vanewill rise, the shaft 0 moving upward in its bearings, and the vane beinglifted up by the chain f as the arm dis carried away from the heel ofthe vane. If the force of the wind decreases, then the weight of thevane, acting through the chain f upon the bar or arm cl, will have atendency to return the wheel to its former position, the shaft 0, uponwhich the vane is secured, descending in its bearings.

The chain can be adjusted at difierent points upon the bar or arm d, andalso on the center bar of the vane, as may be desired, so that more orless power will be required to throw the wind-wheel out of the wind. Thearrangement of the vane, chain, and arm d are such that the resistanceof the vane to the movement of the wind-wheel out of the wind varieswith the varying positions of such wheel.

In Fig. 4 I have shown a modification, the vane being so connected thatit will not move vertically, and the wind-wheel and hangers connectedtherewith being so constructed as to move up and down. In this Fig. 4, mis the wind-wheel shaft. n is the vane. 0 0 are journals permanentlyconnected with the casting 1). 1" are hangers pivoted on the journals 00, so that they can rise and fall on 0 0. fis a chain. One end isconnected with-the long bearing through which the wind-wheel shaftpasses. The other end is connected to the bar or arm 8. When so made thewind-wheel and parts connected therewith can rise on the journals 0 0 asthe wheel is thrown out of the wind and fall as the force of the winddecreases, producing the same results as with the first-describedconstruction and in sub- 5 stantially the same way. I prefer theconstruction first described.

A friction roller or pulley could be placed in each of the bearings forthe shaft or rod 0.

A rod properly hinged to the vane and to 100 the arm (I might be used inplace of the chainf.

The weight of the vane may be supported by the chain, or it may rest onthe lower bearmg.

A chain maybe used as a stop, the same being properly located on theback side of the vane.

The vane may be in a line with the windwheel shaft, in which case itwill be advisable to so adjust the chain f that the vane will stand at aslight angle.

What I claim as new, and desire to secure by Letters Patent, is asfollows LEVI M. DEVORE.

-Witnesses:

G. A. WEAVER, W. O. HEA.

